Not until next month.. I am on holidays and I don't have the full romset here
From the changelog I guess the bulk of the task is the neogeo roms...
It's "just" a matter of updating the neogeo roms to match the new mame version, and test the previously not working roms I listed... (generating dumps for the non-working neogeo roms), assuming no game that was playable isn't on this new fba2x...